Mössbauer studies of thiospinels. V. The systems Cu1−xFexMe2S4 (Me = Cr, Rh) and Cu1−xFexCr2(S0.7Se0.3)4

Riedel, Erwin; Karl, R.; Rackwitz, R.

doi:10.1016/0022-4596(81)90390-x

Cited by 19 publications

(11 citation statements)

References 19 publications

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“…Fletcherite was found at the Fletcher mine, Reynolds County, Missouri, U.S.A., and described by Riedel and Horvath 1973; (2) Lundqvist and Westgren 1938; (3) Riedel et al 1981;(4) Lo Presti and Destro 2008;(5) Warczewski et al 1997;(6) Wittlinger et al 1997;(7) Skinner et al 1964;(8) Hahn and Klingler 1950;(9) Craig and Carpenter 1977;(10) Lundqvist 1947;(11) Huang and Knop 1971;(12) Tenailleau et al 2006;(13) Furubayashi et al 1994;(14) Yu 1996;(15) Institute of Geochemistry, Chinese Academy of Science 1981; (16) Ramdohr and Schmitt 1955;(17) Yang et al 2007;(18) Vuorelainen et al 1964. Craig andCarpenter (1977).…”

Section: Sulfospinels and Selenospinelsmentioning

confidence: 98%

“…Cuprorhodsite forms an extensive solid solution with cuproiridsite and malanite (e.g., Garuti et al 1995;Barkov et al 1997). The crystal structure of cuprorhodsite has not been solved, whereas Riedel et al (1981) studied its synthetic analog.…”

Section: Sulfospinels and Selenospinelsmentioning

confidence: 99%

“…The name is after its chemical composition and relationship to cuprorhodsite. Crystal structure of natural material has not been solved, whereas the structure of synthetic FeRh 2 S 4 was studied by Riedel et al (1981).…”

Section: Sulfospinels and Selenospinelsmentioning

confidence: 99%

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The systematics of the spinel-type minerals: An overview

Biagioni

Pasero

2014

American Mineralogist

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Compounds with a spinel-type structure include mineral species with the general formula AB 2 φ 4 , where φ can be O 2-, S 2-, or Se 2-. Space group symmetry is Fd3m, even if lower symmetries are reported owing to the off-center displacement of metal ions. In oxide spinels (φ = O 2-), A and B cations can be divalent and trivalent ("2-3 spinels") or, more rarely, tetravalent and divalent ("4-2 spinels"). From a chemical point of view, oxide spinels belong to the chemical classes of oxides, germanates, and silicates. Up to now, 24 mineral species have been approved: ahrensite, brunogeierite, chromite, cochromite, coulsonite, cuprospinel, filipstadite, franklinite, gahnite, galaxite, hercynite, jacobsite, magnesiochromite, magnesiocoulsonite, magnesioferrite, magnetite, manganochromite, qandilite, ringwoodite, spinel, trevorite, ülvospinel, vuorelainenite, and zincochromite. Sulfospinels (φ = S 2-) and selenospinels (φ = Se 2-) are isostructural with oxide spinels. Twenty-one different mineral species have been approved so far; of them, three are selenospinels (bornhardtite, trüstedtite, and tyrrellite), whereas 18 are sulfospinels: cadmoindite, carrollite, cuproiridsite, cuprokalininite, cuprorhodsite, daubréelite, ferrorhodsite, fletcherite, florensovite, greigite, indite, kalininite, linnaeite, malanite, polydymite, siegenite, violarite, and xingzhongite. The known mineral species with spinel-type structure are briefly reviewed, indicating for each of them the type locality, the origin of the name, and a few more miscellaneous data. This review aims at giving the state-of-the-art about the currently valid mineral species, considering the outstanding importance that these compounds cover in a wide range of scientific disciplines.

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Section: Sulfospinels and Selenospinelsmentioning

confidence: 98%

Section: Sulfospinels and Selenospinelsmentioning

confidence: 99%

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The systematics of the spinel-type minerals: An overview

Biagioni

Pasero

2014

American Mineralogist

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“…In addition, several transition elements occurring in Cu-and S-bearing compounds have two or more possible formal charges that need to be independently determined. In fact, they cannot be constrained by charge balance as the charge of S can assume non-integer values between -2 and -1, due to the presence of holes in the S 3p band (e.g., Riedel et al, 1981;Pattrick et al, 2008).…”

Section: Issues In the Classification Of Chalcospinels According To Tmentioning

confidence: 99%

Nomenclature and classification of the spinel supergroup

Bosi

Biagioni

Pasero

2019

ejm

105

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A new, IMA-approved classification scheme for the spinel-supergroup minerals is here reported. To belong to the spinel supergroup, a mineral must meet two criteria: (i) the ratio of cation to anion sites must be equal to 3:4, typically represented by the general formula AB 2 X 4 where A and B represent cations (including vacancy) and X represents anions; (ii) its structure must comprise a heteropolyhedral framework of four-fold coordination polyhedra (TX 4) isolated from each other and sharing corners with the neighboring six-fold coordination polyhedra (MX 6), which, in turn, share six of their twelve X-X edges with nearestneighbor MX 6. Regardless of space group, the X anions form a cubic close-packing and each X anion is bonded to three M-cations and one T-cation. The fifty-six minerals of the spinel supergroup are divided into three groups on the basis of dominant X anion: O 2-(oxyspinel), S 2-(thiospinel), and Se 2-(selenospinel). Each group is composed of subgroups identified according to the dominant valence and then the dominant constituent (or heterovalent pair of constituents) represented by the letter B in the formula AB 2 X 4. The oxyspinel group (33 species) can be divided into the spinel subgroup 2-3 ðA 2þ B 3þ 2 O 4 Þ and the ulvöspinel subgroup 4-2 ðA 4þ B 2þ 2 O 4 Þ, the thiospinel group (20 species) into the carrollite subgroup 1-3.5 ðA 1þ B 3:5þ 2 S 4 Þ and the linnaeite subgroup 2-3 ðA 2þ B 3þ 2 S 4 Þ, finally, the selenospinel group (3 species) into the bornhardtite subgroup 2-3 (A 2+ B 3+ 2 Se 4) and the potential ''tyrrellite subgroup'' (A 1þ B 3:5þ 2 S 4 , currently composed by only one species). Once the subgroup is established based on the valence of B, then the mineral species is identified by the combination of the dominant A-and B-cations. Moreover, the present nomenclature redefines the ideal formulae of titanomaghemite, cuprorhodsite, malanite, maghemite, filipstadite, tegengrenite, rhodostannite, toyohaite and xingzhongite as well as discredits ''iwakiite'', ''hydrohetaerolite'' and ''ferrorhodsite''.

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“…(1) that f will increase rapidly and thus, reversal of magnetization over comparatively large volumes can be thermally activated. Cu 0X5 Fe 0X5 Rh 2 S 4 and Cu 0X5 Fe 0X5 Cr 2 S 4 are both known to crystallize in the spinel structure with lattice parameters of 9.843 and 9.904 A Ê , respectively [8,9]. As a result of the strong preference of Cr 3 and Rh 3 ions for the octahedral site [10], both compounds beome normal spinels with iron and copper ions on the tetrahedral sites and chromium or rhodium ions on the octahedral sites.…”

Section: Introductionmentioning

confidence: 99%

Superparamagnetic Relaxation in Cu0.5Fe0.5Cr0.5Rh1.5S4

Oak

Baek

Cho

1998

Phys. Status Solidi B

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Cu 0X5 Fe 0X5 Cr 0X5 Rh 1X5 S 4 has been studied by Mo È ssbauer spectroscopy, X-ray diffraction and magnetic measurements. The crystal structure is found to be a cubic spinel with lattice constant a 0 9X884 A Ê . The iron ions are in ferric states and occupy the tetrahedral sites. As the temperature increases toward the Ne Â el temperature, line broadening and a pronounced central peak appear, suggesting superparamagnetic relaxation. As the temperature increases, the relaxation rate increases rapidly with a tenth power of the absolute temperature.

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Mössbauer studies of thiospinels. V. The systems Cu1−xFexMe2S4 (Me = Cr, Rh) and Cu1−xFexCr2(S0.7Se0.3)4

Cited by 19 publications

References 19 publications

The systematics of the spinel-type minerals: An overview

The systematics of the spinel-type minerals: An overview

Nomenclature and classification of the spinel supergroup

Superparamagnetic Relaxation in Cu0.5Fe0.5Cr0.5Rh1.5S4

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